“by trial and error”简单造句，by trial and error造句子

In fact, in this relationship, the robot does all the work, learning by trial and error, taking all the risks and adapting to my moods and whims.

Human beings were not the pinnacle of a purposeful creation; like everything else, they evolved by trial and error and God had no direct hand in their making.

The other great thing is that it's an unwritten code, which means you get to learn by trial and error.

The other option is to learn by trial and error.